Electronic blackboard



FIG. 1 is a front elevational view of an electronic blackboard according to my design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a left side elevational view thereof,

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top elevational view thereof;

FIG. 6 is a bottom elevational view thereof;

FIG. 7 is a front, bottom perspective view thereof; and,

FIG. 8 is a back, top perspective view thereof.

The broken lines in the figures represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an electronic blackboard, as shown and described. 